基于机载实时模型的发动机执行机构 故障状态参数估计

为了对发动机的主燃烧室供油量控制器、喷管喉部面积控制器、风扇进口可调导叶角度控制器、压气机进口可调导叶角度控制器进行故障诊断,建立了基于简化n+1残量方法的非线性机载实时模型,并结合常增益扩展卡尔曼滤波器建立执行机构控制参数估计器,利用非线性部件级模型模拟飞行包线内发动机执行机构的软故障.仿真结果表明:执行机构控制参数估计器在飞行包线内能实现较高精度估计,且具有较好的稳定性.

Actuator Fault State Parameter Estimation of Aeroengine Based on On-Board Real Time Model

In order to perform fault diagnosis on main combustion fuel supply quantity controller, the nozzle throat area controller, fan inlet guide vane angel controller and compressor inlet guide vane angle controller for aeroengine, the on-board real time nonlinear model was established based on n+1 residual method, and actuator control parameter estimator was established combining with constant gain extended Kalman filter. The actuator soft fault within the whole flight envelope was simulated by a nonlinear component-level model. The simulation result shows that actuator control parameter estimator provides high precision and stability within the whole flight envelope.